body {
  background: #fafbfc;
  font-family: 'PingFang SC', 'Arial', sans-serif;
  margin: 0;
  padding: 0;
}
#root {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 40px;
}
.word-card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 2px 8px #eee;
  padding: 40px 32px;
  width: 350px;
  text-align: center;
}
.word {
  font-size: 2.5rem;
  font-weight: bold;
  margin: 16px 0 8px 0;
}
.phonetic {
  color: #888;
  font-size: 1.2rem;
  margin-bottom: 16px;
}
.definition {
  color: #555;
  font-size: 1.1rem;
  margin-bottom: 24px;
}
.controls {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}
.switch-label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 1rem;
}
.play-btn {
  background: #e6f0ff;
  color: #2563eb;
  border: none;
  border-radius: 8px;
  padding: 12px 0;
  width: 100%;
  font-size: 1.2rem;
  cursor: pointer;
  margin-top: 16px;
  transition: background 0.2s;
}
.play-btn:hover {
  background: #d0e3ff;
} 